Re: [Beowulf] Cannot use more than two nodes on cluster

2012-09-19 Thread Antti Korhonen
Passwordless SSH works between all nodes. Firewalls are disabled. From: g...@r-hpc.com [mailto:g...@r-hpc.com] On Behalf Of Greg Keller Sent: Wednesday, September 19, 2012 8:43 PM To: beowulf@beowulf.org; Antti Korhonen Subject: Re: [Beowulf] Cannot use more than two nodes on cluster I am going

Re: [Beowulf] Cannot use more than two nodes on cluster

2012-09-19 Thread Greg Keller
I am going to bet $0.25 that SSH or TCP/IP is configured to allow the master to get to the nodes without a password, but not from one Compute to the other Compute. Test by sshing to Compute1, then from Compute1 to Compute2. Depending on how you built the cluster, it's also possible there is iptab

[Beowulf] Cannot use more than two nodes on cluster

2012-09-19 Thread Antti Korhonen
Hello I have a small Beowulf cluster (master and 3 slaves). I can run jobs on any single nodes. Running on two nodes sort of works, running jobs on master and 1 slave works. (all combos, master+slave1 or master+slave2 or master+slave3) Running jobs on two slaves hangs. Running jobs on master + any

Re: [Beowulf] Xeon Phi

2012-09-19 Thread Olli-Pekka Lehto
I've understood that while Phi is the product line, MIC will still remain the generic name for the architecture family (similar to x86). To add to the acronym-soup there is also a separate naming scheme for the binary architecture: If you look at newer binutils packages, the current (Knight's C

Re: [Beowulf] FY;) GROMACS on the Raspberry Pi

2012-09-19 Thread Bill Broadley
I taught a MPI class a few times and wanted something simple, fun, and could be improved upon several times as the students learned MPI. It's obviously embarrassingly parallel, but non-trivial to do well. There's often not enough work per pixel or per image to make the communications overhead lo

Re: [Beowulf] FY;) GROMACS on the Raspberry Pi

2012-09-19 Thread Lux, Jim (337C)
Bringing up an excellent question for "learning to cluster" activities.. What would be a good sample program to try. There was (is?) a MPI version of PoVRAY, as I recall. It was nice because it's showy and you can easily see if you're getting a speedup. Computing pi isn't very dramatic, especi

Re: [Beowulf] Xeon Phi

2012-09-19 Thread James Cuff
nounced Phee > > Anyway off to program by Raspberry Pee (!) > > Daniel > Bull Information Systems > -- next part -- > An HTML attachment was scrubbed... > URL: > http://www.beowulf.org/pipermail/beowulf/attachments/20120919/7106a627/attachment-0001.html ___ Beowulf mailing list, Beowulf@beowulf.org sponsored by Penguin Computing To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf

Re: [Beowulf] Southampton's RPi cluster is cool but too many cables?

2012-09-19 Thread Douglas Eadline
> On 09/19/2012 11:02 AM, Prentice Bisbal wrote: >> On 09/18/2012 10:46 PM, Christopher Samuel wrote: >>> -BEGIN PGP SIGNED MESSAGE- >>> Hash: SHA1 >>> >>> On 19/09/12 12:04, Vincent Diepeveen wrote: >>> Maybe do it wireless at around a 2800Mhz frequency instead of using cable

Re: [Beowulf] Xeon Phi

2012-09-19 Thread Daniel Kidger
On 19 September 2012 15:09, Chris Dagdigian wrote: > Daniel Kidger wrote: > >> The technology was also known as MIC : pronounced 'Mick' or 'Mike' >> depending on who you spoke to. >> That was confusing - so with PHI it is now unambiguous right? er no - I >> hear people say both 'Fee' and 'Fi' >>

Re: [Beowulf] Southampton's RPi cluster is cool but too many cables?

2012-09-19 Thread Ellis H. Wilson III
On 09/19/2012 11:02 AM, Prentice Bisbal wrote: > On 09/18/2012 10:46 PM, Christopher Samuel wrote: >> -BEGIN PGP SIGNED MESSAGE- >> Hash: SHA1 >> >> On 19/09/12 12:04, Vincent Diepeveen wrote: >> >>> Maybe do it wireless at around a 2800Mhz frequency instead of using >>>cables. Then sta

Re: [Beowulf] Southampton's RPi cluster is cool but too many cables?

2012-09-19 Thread Prentice Bisbal
On 09/18/2012 10:46 PM, Christopher Samuel wrote: > -BEGIN PGP SIGNED MESSAGE- > Hash: SHA1 > > On 19/09/12 12:04, Vincent Diepeveen wrote: > >> Maybe do it wireless at around a 2800Mhz frequency instead of using >> cables. Then stack them all up in a 2nd hand microwave and invent >> the

Re: [Beowulf] Xeon Phi

2012-09-19 Thread Chris Dagdigian
Daniel Kidger wrote: > The technology was also known as MIC : pronounced 'Mick' or 'Mike' > depending on who you spoke to. > That was confusing - so with PHI it is now unambiguous right? er no - > I hear people say both 'Fee' and 'Fi' > FWIW - last week at Intel IDF2012 in San Francisco every sin

[Beowulf] HP v1910-48g (old 3com 3CRBSG5293)

2012-09-19 Thread Eugen Leitl
Anyone running that switch in production? Any issues under load? ___ Beowulf mailing list, Beowulf@beowulf.org sponsored by Penguin Computing To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf

Re: [Beowulf] FY;) GROMACS on the Raspberry Pi

2012-09-19 Thread Bogdan Costescu
On Tue, Sep 18, 2012 at 10:10 AM, Daniel Kidger wrote: > I touched on the Gromacs port to ClearSpeed when I worked there - I then > went on to write the port of AMBER to CS > plus I have a pair of RPis that I tinker with. I'm not quite sure what the interest is... GROMACS is quite famous for havi